Tripping attachment for revolving steam and electric shovels.



J. HAAS (T; C. STRADA.

TRIPPING ATTACHMENT FOR REVOLVING STEAM AND ELECTRIC SHOVELS.

APPLICATION TILED NOV. 1, 1915.

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nnirnn sirarns ra rnwr JOSEPH I-IAAS ANDCHARLES STRADA, OF NEW YORK, N. Y.

TRIPPING ATTACHMENT FOR REVOLVING STEAM AND ELECTRIC SHO'VELS.

Application filed November 1, 1915.

To all whomz't may concern:

Be it known that we, JosnrH HAas and (Jr-menus S'rnana, citizens of the United States, residing at New York city, New York, have invented certain new and useful Improvements in Tripping Attachments tor Revolving Steam and Electric Shovels, of which the following is a specification.

This invention relates to a tripping attaclnnent :t'or revolving steam and electric shovels, the object being to provide means whereby the engineer in charge may trip or release the dipper latch while operating the lever or levers controlling the boom and dipper handle.

A further object being to provide a tripping attachn'lent as above described which can be easily and inexpensively attached to the car i 'ame and having connection with the operting shaft whereby the shovel ran her or cngii'ieer is enabled, by foot pressure only, to accurately dump a load either when the dipper handle is at a standstill or when being racked out or in without interfering in the least degree with his other duties.

The invention further consists of a tripping attachment which is adapted for use in connection with any size or style of shovel and which eliminates thenecessity of employing steam or other types of rigs.

In the drawings Figure 1 an elevation partly diagrammatic, showing parts of shovel car structure with my tripping attachment mounted herein and showing a dipper and its handle and the usual racking pinion.

Fig. 2 is an enlarged elevation of some of the operative parts.

Referring to the drawing we show at 10 a portion of the door beam ofa car in which are housed the usual hoisting engines and other machinery (not shown) and at 11 we show a portion of the roof beam of the said car.

Suitably secured to the root beam is a hanger frame 12, provided with a guide block 13, having a groove 14, in which a vertically arranged bar 15, is movable, said bar being confined in. the groove by a cap plate 16, secured in place by screws or bolts as shown.

The bar 15, is jointed as at 17 and is pivotally connected at its lower end as at 18, to an arm 19 mounted loosely on the usual operating shaft 20, carrying the usual con- Specification of Letters Eetent.

Patented May "2, i912.

Serial No. 58,990.

trolling levers, but one of which is shown, and suitably mounted in fixed relation with the arm. 19, at one side thereof is a foot lever 21.,

At the top the bar 15 carries a yoke constitutecl by a cross head 22, and upwardly directed forked end extensions 23, in which rollers 2e, are rotatably mounted, and passing through the forked extensions 23, under the rollers is a tripping line comprising a chain, rope or cable 25, having fixed connection at one end with the roof beam 11, as at 26, and at the other end with the free end of the usual trip lever 27. Rollers or sheaves 28, are provided on the roof beam to support and guide the line in the operation of dumping the dipper load.

in carrying out our invention we provide a compensating weight 29, slidable on a vertical bar 30, attached to the car structure and which is adapted to automatically take up line slack as the dipper handle is shifted, and said. weight carries a sheave or roller 31, around which the line 25, passes from its attachment at 26, to and over a sheave or roller 32, and along the roof beam 11. in a straight line to and over a sheave or roller'33 and thence, to the tripping lever be'tore mentioned, which lever is pivoted to the dipper handle at 84, and is connected at by a chain 56 or the like, with the dipper latch mounted in the usual manner on the hinged dipper gate 38.

The dipper is shown at 39, and it's handle at 40, which handle is provided with the usual rack il, meshing with the usual racking pinion 42.

Suitably fixed to the roof beam 11, be tween the rollers 24 is a bracket 43, provided with anchor teeth or ribs 454:, which are arranged to engage the line 25, to prevent longitudinal movement thereof at that point during the tripping operation.

In the operation of dumping, when the loaded dipper being racked out the line 25 is drawn outwardly over the sheaves 28, and 33, by reason of its attachment to the trip lever 27, until the engineer standing at the operating shaft depresses the foot lever 21, drawing down the cross head 22, causing the rollers 24, which are normally held free of the line 25, by a weight to, to engage said line and draw it down on the teeth std thus forming loops at either side of the bracket 43. which operation draws the end portions of ill) sorted to without'departing from the spirit of the invention or the scope of the appended claims.

Having thus described our invention what we claim as new and desire to secure by Let ters Patent is 1. In a tripping attachment of the class described, a trip line, means controlled by gravity for taking up the slack therein, means for anchoring the line centrally, and means for forming loops at opposite sides of the anchored portion for the purpose specified.

2. In an attachment of the class described, a trip line, a lever secured thereto, rollers adapted to support the line, a bracket having anchor teeth underlying the line, and means for drawing the said line out of its normal position for the purpose specified.

3. An attachment of the class described, comprising in combination, a looped line, a lever attached thereto, a weight suspended in the looped portion thereof. a bracket having teeth underlying the line, a yoke, rollers carried thereby, and overlying the line at opposite sides of the bracket, a hanger frame provided with a guide block, a slidebar mounted in the guide block and supporting theyoke, and means for depressing the slide bar and force it downwardly to engage the teeth and to draw an end portion of the line inwardlyior the purpose specified.

l. In a tripping attachment of the class described, a looped line, rollers supporting the same, a trip lever attached thereto, a compensating weight suspended in the looped portion of the line, a bracket having teeth underlying the line but normally spaced therefrom, a yoke, rollers mounted thereon and disposed above the line at opposite sides of the bracket, and a foot lever connected to the yoke for depressing the same whereby loops may be formed in the said line by the rollers on the yoke to draw an end portion inwardly for the purpose specified.

5. In an attachment of the class described, a trip l.ine,a trip lever attached thereto, said line being formed with a loop adjacent one end, a compensating weight suspended in said loop, a fixed bracket having teeth underlying said line, and means for pulling the line out of its normal position to draw an end portion thereof inwardly, for the purpose specified.

6. In a tripping attachment of the class described, a looped trip line, a lever eonnected therewith, a dipper latch also connected to said line, a compensating weight suspended in the looped portion of the line, a fixed bracket provided with teeth, a yoke straddling the bracket, rollers mounted in the yoke, and means for depressing the yoke to cause the teeth and last named rollers to engage the line to withdraw the dipper latch as described.

7. In a tripping attachment of the class described, a looped trip line, a. dipper latch connected to said line, a compensating weight carried by the looped portion of the line. rollers supporting the line, a hanger frame having a guide block, a yoke slidably mounted therein, rollers carried by the yoke and arranged above the line, a bracket having teeth projecting under the line and between the last named rollers, and means for depressing the yoke to operate the line and withdraw the dipper latch as specified.

8. A tripping attachment comprising a line provided with a loop, a compensating weight suspending in said loop, a yoke having rollers arranged above the line, a bracket projecting through the yoke and having teeth disposed under the line, and means for depressing the yoke to cause the rollers to force the central portion of the line into engagement with the teeth to withdraw the dipper latch as specified.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses, this 22nd day of October, 1915.

JOSEPH HAAS. CHARLES STRADA.

lVitnesses ADOLPH A. HAGEMAN, BENJAMIN B. VERNON.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. C. 

